Configurationally fixed .alpha.-alkoxyorganocopper reagents: 1,4-addition of cyclic enantiopure transferable ligands with complete retention of configuration
摘要:
Optically active 4-lithio-1,3-dioxanes have been converted to the corresponding TMEDA-organocopper reagents and shown to undergo conjugate addition reactions to ethyl propiolate with complete retention of configuration.